Insole



Sept. 29, 1936. HARTL 2,055,574

INSOLE Filed Nov. 9, 1954 Fig.1.

Patented Sept. 29, 1936 UNITED STATES PATENT OFFICE INSOLE Hans Hirtl,Dresden, Germany, aslgnor to Josef Miiller, Prague, Czechoslovakia 1Claim.

My invention relates to footwear and more especially to the insolesforming part of boots and shoes. It is an object of my invention toprovide an insole which possesses particularly favorable 5 properties.

The insole forming the subject matter of this invention is formed with acomparatively large aperture in which is arranged an elastic cushion,preferably a sponge rubber cushion, which is preferably enclosed betweena thin sheet of rubher and a preferably apertured cover sheet ofleather; cloth or the like. Preferably the rubber sheet projects betweenthe circumferential edge of the sponge-rubber cushion and the inner edgeof the aperture in which this cushion is arranged, and the marginalportion of the rubber sheet rests on the part of the insole whichsurrounds the aperture.- The cover sheet is preferably attached to theinsole by stitching or by means of a suitable cement or by other means.

In the drawing affixed to this specification and forming part thereoftwo insoles embodying my invention are illustrated diagrammatically byway of example.

5 In the drawing:

Fig. 1 is a plan view of an insole.

Fig. 2 is a transverse section of the forepart of the insole shown inFig. 1.

Fig. 3 is a view similar to Fig. 2 but showing a modification.

Referring to the drawing and first to Figs. 1 and 2, m is the outsole,is is the upper, a is the insole and f is the aperture formed in thefront half of the insole. c is a sheet of rubber resting with :5 itsmarginal portion on the part of the insole surrounding the aperture,while its middle portion extends into the aperture, resting on the solem. b is the sponge rubber cushion having substantially the contour ofthe aperture and resting on the middle portion of the rubber sheet 0. eis the apertured cover sheet resting on the sponge rubber cushion and onthe border portion of the insole, 9 being perforations providing thenecessary ventilation and allowing the air enclosed in the sponge rubbercushion below the cover sheet 6 and compressed by the foot of the wearerto escape when the foot is lifted from the ground, while the cushion isallowed to expand, taking in air and prepare a fresh intervening airspace for the foot.

In the second modification shown in Fig. 3 a 10 sheet of ,fabric h suchas linen is interposed between the'rubber sheet c and the sole m, itsmarginal portion being inserted between the upper and the insole andcemented or otherwise attached to this latter. This sheet of fabricserves for stif- 15 fening the part of the insole surrounding theaperture.

In preparing the insole I may split the front part of the piece ofleather, from which it is formed, and form the aperture only in one ofthe two halves, the rubber cushion being inserted in the aperture andthe other non-aperture half replacing the cover sheet e shown in Figs. 1and 2.

I wish it to be understood that I do not desire to be limited to theexact details of construction shown and described, for obviousmodifications will occur to a person skilled in the art.

I claim:

An insole comprising in combination a Piece ot leather having the formof an insole and provided with a larger aperture in its front portion,an elastic sheet arranged with its middle portion extending into theaperture and with its marginal portion resting on the portion of theleather piece bordering the aperture, an air-filled cushion on 85 saidmiddle portion, a cover sheet on said cushion and extending over saidmarginal portion, and a sheet of fabric extending underneath both saidelastic sheet and said piece of leather.

HANS 112mm 40

